package For;

public class 打印三角形 {
    public static void main(String[] args) {
        for (int i=1;i<=5;i++){
            for (int j = 5; j >=i ; j--) {
                System.out.print(" ");
            }
            for (int j = 1; j <=i; j++) {
                System.out.print("A");
            }
            for (int j = 1; j <i; j++) {
                System.out.print("A");
            }

            System.out.println();
        }
    }
}